Pin-joint.



PATENTED JAN. 6, 1903.

No. 717,555. I

G. W. DOVER. Pm JOINT. APPLICATION FILED JULY 15, 1902 N0 HDDBL.

ills E 5. 7A

THE annms' PETERS 00.. mmoumu. wumns'ron. n c.

UNITED STATES PATENT FFI on.

GEORGE W. DOVER, OF ORANSTON, RHODE ISLAND.

PIN-JOINT.

SPECIFICATION forming part of Letters Patent No. 717,555, dated January 6, 1903.

ApplioationfiledJuly15,l902. $erialNo.1l5,687. (1% model.)

To all whom it may concern.-

Be it known that I, Gnonon W. DOVER, a citizen of the United States, residing at Oranston, in the county of Providence and State of 5 Rhode Island, have invented certain new and useful Improvements in Pin-Joints, of which the following is a specification.

My invention relates to that class of pinjoints commonly known as open joints to to distinguish them from closed or cup joints,

both of which are used in connection with ornamental pins or brooches.

The typical and common form of open joints consists of two upright distended walls or ears rising from a flat base. Traversin g each wall and in axial alinement are cylindrical passages or openings of uniform diameter throughout. In such a structure it is impossible to utilize a journal of predetermined length which would be both cheaper and could be more speedily inserted than the pivot commonly used, which is inserted from one side and is out after insertion in each individual case. This difficulty might theoretically be overcome by making a special bearing-pin with tapering and pointed terminals; but after compression of the walls of the joint it is found by trial that the bearing-pin usually works loosely, which of course gives such 0 an old efiect to the brooch that it is not marketable. In any event the projecting points of the bearing-pin cannot be upset as could an obtuse head.

The dificulties above enumerated are oh- 3 5 viated by my structure, which is detailed herein conjointly with the accompanying drawings, wherein Figure 1 is a side elevation of a brooch or pin upon which is attached my joint, also dis- 0 played in similar elevation. Fig. 2 is a transverse section of the above brooch on line as x of Fig. 1, showing the joint-walls distended; and Fig. 3, a similar section of the same, showing the walls in final position engaging the 5 journal-pin of the pin-tongue, the journal and tongue shown in elevation.

Like letters of reference indicate like parts throughout the views.

My new joint is shown affixed to the back of a brooch A. It consists in detail of a base a and upwardly-directed walls 6 on either side. The walls originally lie in diverging planes, as shown in Fig. 2. Both walls are transversely pierced at the same relative point in such a manner that the openings 0 have the shape of truncated cones, the larger diameters being upon the inner faces of the walls. The loop 3 of the pin-tongue d carries acylindrical pivot e, which should be sufficiently long to project slightly beyond the outer surface of the walls when the latter are bent into final position. The tongue, with its pivot e, is introduced between thewalls b of the joint, with the pivot ein alinement with the openings 0. Then with pliers orother'w ise the walls I) are forced toward each other to a position at right angles to the base a, which results, as above suggested, in the extremities of the pivot e slightly projecting. These are then upset, forming almost imperceptible flanges f g.

Having thus described my invention, what I claim asnew, and desire to secure by Letters Patent, isi l. A pin-joint consisting of a base, diverging walls integral with the base and provided with bearing-passages having a larger internal than external diameter.

2. A pin-joint consisting of a base diverging walls integral with the base and provided with bearing-passages of the form of truncated cones.

3. In an article of the class described, the.

passages of the form of truncated cones for the admission of the pivot.

In testimony whereof I have aiiixed my signature in presence of two witnesses.

GEORGE W. DOVER.

Witnesses:

GARRALD S. HOWLAND, HORATIO E. BELLows. 

